Originally Posted by DockingPilot
Hmm that's because your Montana isn't a Zumo Its more like a GPSMap series Almost. Lol
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On the zumo 66x units you can do your mixed route planning in Mac-BC and then convert the mixed route to a track. Import the track into the zumo as a custom route (not an Off-road Track).
The zumo will convert the track to route faithful to the track - just keep Recalc=off. Use to do this all the time when I had the zumo.